Manually-operated winding-drum mechanism.



w. E. BOEHGK.- MANUALLY OPER-ATED WINDING DRUM MEGHANISM.

AAPPLIOATION FILED MAY 6, 1912.

1,044,008. Patented Nov.'12,'1912.

- 2 SHEETS-SHEET 1.

" "lIHlUW i f Enron wfmfssfs W E l A ATTORNEY im AVAHJABLE @Pff pellferat Jersejz Cit ,-:in-thjev4 county ndfftteo ?'Nw-Jrses'lihve tainlg new` ande u "efulf Improve? anual'l'jpfatedf. Vl-finding-A fb VEt-h'e following tieni@ reference had; teV the venti'o'n relates.4 o'vein'ents in' viators. or, tie "r1n"gjv machines' in d-carryinggplatfrm irsfraised operatedn'iechanismandfalls "its downwazdfnioyement being: nti-olle by manu: zllyfeper'a'ted` mecha objectioffthis invention is the .pevisions'injyan a params of the character' justrrefe'r '-to o manuallypperatedmech? 2 0 anisnrmr rtrollinggtli'e upward'and downf- 'smi)x7erneut.'i cfg/the. lloatl-' carryi'r'ig platform besimple in. constructionandparticii-Iarlyf saLfe-andfreliablein o erat i01 1j' 'and'use'and'whichfiwill 'safe uar the pperator' f ronr accident dueto the ackward ota'tionpf-the crank Sby which isractuat'ed fthe mechanism fer raisingtheplatform, 'f f In'.z the drawingsfi Villustrating 'the1 :princi lgtlliainrexition-.and the.1best.n 1 1de110W ipp'ed Ywit h 'an embodiment :of ig.' "2qis }a side elevation. of what* ig-.'l'ji'g' isa detail show l.' e1evation the *mechanism forv loweringvtheplatform; and Fig. lyiewdooking in the direction of iA .of Figff b o f the'trck (1 is supported" ,oftruck wheels c and asteerin dtally mounted upon. the truc e' base e of theelevatorfframe'' from basethere `rises a pair of side tan dards 'or'.colmns f''the upper endsof .which -areconriected'by 'a top cross-glrder orreap-beam; g-gfrom which is suspended a cenv v t'rallyedisposed sheave h. `Oyer the latter acable z' one end of wlneh 1s attached to;v .the elevator 'platform y' which slides up 11d-down along theside standards er colns lotherend of :the cable z' 1s fas- Qin-ding drum 7s which turns with kiest shaft m'driyenby the vco f n.' Uno lnterm A j-EW JERSEY; assrenon' 'ro NEW-lyon1:

QF .Innenraum NEW JERSEY, A

" MEGHANISMJ l serial; 695423:

ate shaft a therearefm'ounteda pinion p and weer "lraend Non@ 1.9512

plates or brackets t, uarranged between the side"standardsv f, The rear ends of the uppermost-'and' intermediate shafts 0, project .rearwardly beyond .the rear plate u' and are. faced orsquared -so'as'to lit in the socketof a' crank v by. 'which these shafts. may .be

turned:'-Upon' the projecting squared end face ofwhich -isfo'rmed a recess 1o the side .oftheuppermost shaft .s there 1s mounted lloose'or-ldle there'onabrake-disk w in the rear .wall of whichqisi cylindrical and is formed with inwardlyLprojecting ratchet teeth --Fastencd upon the projecting end ofA this up'permostshafts isa payvlfcarrier y which face of' the-brake-disk- 'w is passedabrakeeiid of w ich' isffastened to the lower end of.

an inverted Uls'haped brake-lever 4 piyotally 'mounted o nthe upper end of thefplate u. Onjeeud' of a curved--laf'spring 5 is fastened 'to' lthe topt/ of'ff'the plate u While its .other "or free/end bears against; a screw 6 carried'bfy the upper end of the brake-lever 4 It; is obvious that by turning the screw 6 .th'eVtension of the brake-spring 5 niay. be adjusted.. The brake spring. 5 bears agalnst the upper end of the brake-lever'. 4 and `swings the latter so that the brake-band 3 will beheldtightly against the brake-disk "fw, whereby retrograde movement of the up,- permost gear-shaft s is' prevented. To release the--bralre 'a rotatable cam-shaft 7v is arranged inthe .upper end of the rear plate and is provided with a caml 8 which by turning the cam-shaft may be made to bear. ragainst? one .leg of the brake-lever 4 and `hand 'or strap l3 one end o'f which. is fastened igur 1;' Q Sla-'reardevatmp' of portable -,1 q to theup tend of the plate u and th`e other thereby to swing the latter on" its ivot so as to slacken theV brakestrap 3. ign 4). 'The cam-shaftV 7 is'for'med with ,a projecti ing squared or faced end -7 which is 4of the same shape as the projecting end of the uppermost gear-shaft s.

After the load-carrying platform has been raised by turning the gear-shaft a '(or the gear-shaft o), it will be held in its elevated position by means of the brake mechanism Yhereinbefore described. In order to allow the platform' to fall under the influence of gravity or by its own weight, it is necessary. to release the brake; and to -do thist-he op.

erator is required to Vremove his crank v from the end of the shaft s and engage it i with the end 7 'of the cam-shaft '7 soas to turn the latter to bring the cam 8 against the brake-lever 4 as just described. The opera- .mechanismhaving a shaft for driving said mechanism, said shaft being provided with a non-circular end for engaging a crank;

pawl andratchet mechanlsm mounted on said shaft; a brake'v for controlling said pawl-and-ratchet mechanism when said shaft is being turned4 to raise theload; and

means for releasing said brake toY permit the load to fall by gravity, said means provided. with a non-circular end similar to the non-circular end of said shaft.

2. A -manually-operated winding`drummechanism having a shaft for drivin v said.4 mechanism, said shaft being provide witl'r a non-circular. end for engaging a crank;

abraked'rum mounted on said shaftl andA -formed with ratchet teeth; Aa pawl by said shaft andarranged to engage said teeth when the load falls; a brakefband for said brake-drum; and means for disengag-- ing said brake-band lfrom` said brake-drum' to permit'vthe load to fall by gravity, said. means being provided.- with a non-circular end similari to theno'n-circularendof said shaft. g Y

A manually-operated winding-drum mechanismhaving ashaft for driving said mechanism, said shaftbeing provided with pawl and-'ratchet mechanism' mounted on said shaft; a brake for' ,cont-rolling said pawl and f ratchet mechanism when said shaft is Abeing turned to raise the load; and

a cam-shaft for releasing said brake` to per-.-

mit the load'to fall by gravity, said caln-v shaft being provided with a lnon-circular end similarto the non-circular end of the firstv shaft.

Signed at. JerseyeCity, New Jersey/,this

second day of May, A. D., 1912, in. the

presence of the two undersigned witnesses.

WILLIAM EDWARD BOEHCK.

- Witnesses:

H. S. GnRMoNn, Jr., W. C. COLLINS.

Va non-circularvend for engaging a crank; 

